...where the Messenger of Allah led an army of 1,400 men against the Jews.

- al-Yamamah -

...where Khalid bin al-Walid led an army against the followers of Musaylamah, during the wars of apostacy.

- The Village of Mu'tah (in the Jordan Valley) -

...where Khalid bin al-Walid led an army of 3,000 men against over 100,000 Roman soldiers. This is the battle in which he personally broke over nine swords, smashing them against the skulls of the kuffar.

- The Mountains of at-Ta'if -

...where the Messenger of Allah, commanding 1,000 of his Companions, had laid siege to Hawazin and Thaqif for over two weeks.

- The Valley of Yarmuk (Jordan) -

Here are some more of the Valley of Yarmouk:

...where, under the command of Khalid bin al-Walid, 24,000 Muslims laid waste to a Roman army of 150,000, initiating the Islamic conquest of Sham. This was the battle in which 'Ikrimah, the son of Abu Jahl, was martyred.

- al-Qadisiyyah (Iraq) -

...where Sa'd bin Abi Waqqas miraculously walked an army of 30,000 fighters across the Tigris River (above) on foot during the conquest of Persia.